We did have a delay when ensuring the Rear Cam causes as least interference as possible within the vehicle and its now been achieved.
For this I am of course extremely sorry, I know I can say this on behalf of Nextbase for the delays that have been experienced too.
Now I have the good news (I wanted to ensure it's 100% correct before posting): the product is landing in our distribution centre 15th May, our Technical Support Centre will then soon after receive stock to enable us to distribute to the customers on my (ever growing) list.
I'll subsequently be contacting everyone who has asked for a Rear Cam or to be notified of its release over the next fortnight.
@Auld Reekie that is correct they used to have our products first - however I think this is no longer the case.